Web 端数据交互与 design2 布局修复

统一门户 JSON 契约：新增 GET /templates/{id}，模板/云文件/保存/打开走虚拟 key；
layer 保存弹层替代 prompt，本地 .soon 已登录后台 POST 登记；修复保存静默失败与 design2 全宽布局。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend-web/js/design2/ui.js

@@ -1299,7 +1299,7 @@ $('#open').click(function () {
         return;
     }
     layer.confirm(
-        '<font style="color:black">' + language_str('whetherSave') + '</font>',
+        language_str('whetherSave'),
         function (index) {
             if (typeof window.output === 'function') {
                 window.output(OpenDialog);
@@ -1326,18 +1326,14 @@ $('#open').click(function () {
                     if (typeof window.openFile === 'function') window.openFile(fileKey, j);
                 }
                 function importAndOpen(j, fileName) {
-                    var tok = typeof window.soonGetAccessToken === 'function'
-                        ? window.soonGetAccessToken()
-                        : (localStorage.getItem('soon_access') || '');
-                    if (!tok && typeof window.soonPutSoonSession === 'function') {
+                    if (typeof window.soonPutSoonSession === 'function') {
                         var localKey = window.soonPutSoonSession(j, fileName || 'design.soon');
-                        if (localKey) openWithKey(localKey, j);
-                        return;
+                        if (!localKey) return;
+                        if (typeof window.soonScheduleCloudImport === 'function') {
+                            window.soonScheduleCloudImport(localKey, fileName || 'design.soon');
+                        }
+                        openWithKey(localKey, j);
                     }
-                    if (!window.platformBridge || !window.platformBridge.importSoonFile) return;
-                    window.platformBridge.importSoonFile(fileName || 'design.soon', j).then(function(res) {
-                        if (res && res.fileKey) openWithKey(res.fileKey, j);
-                    }).catch(function () {});
                 }
                 if (file && file.text) {
                     file.text().then(function(t) {
@@ -1364,7 +1360,7 @@ $('#new').click(function () {
         return;
     }
     layer.confirm(
-        '<font style="color:black">' + language_str('whetherSave') + '</font>',
+        language_str('whetherSave'),
         function (index) {
             if (typeof window.output === 'function') {
                 window.output(goFirstPage);